设二元函数 z=sin(xy2)z=sin(xy2), 则 ∂z∂x∂z∂x 等于
A、y2cos(xy2)y2cos(xy2);
B、−xycos(xy2)−xycos(xy2);
C、−y2cos(xy2)−y2cos(xy2);
D、xycos(xy2)xycos(xy2)
发布时间:2025-05-13 21:05:31
A、y2cos(xy2)y2cos(xy2);
B、−xycos(xy2)−xycos(xy2);
C、−y2cos(xy2)−y2cos(xy2);
D、xycos(xy2)xycos(xy2)